// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

(function (mod) {
    if (typeof exports == "object" && typeof module == "object") // CommonJS
        mod(require("../../lib/codemirror"), "cjs");
    else if (typeof define == "function" && define.amd) // AMD
        define(["../../lib/codemirror"], function (CM) {
            mod(CM, "amd");
        });
    else // Plain browser env
        mod(CodeMirror, "plain");
})(function (CodeMirror, env) {
    if (!CodeMirror.modeURL) CodeMirror.modeURL = "../mode/%N/%N.js";

    var loading = {};

    function splitCallback(cont, n) {
        var countDown = n;
        return function () {
            if (--countDown == 0) cont();
        };
    }

    function ensureDeps(mode, cont, options) {
        var modeObj = CodeMirror.modes[mode], deps = modeObj && modeObj.dependencies;
        if (!deps) return cont();
        var missing = [];
        for (var i = 0; i < deps.length; ++i) {
            if (!CodeMirror.modes.hasOwnProperty(deps[i]))
                missing.push(deps[i]);
        }
        if (!missing.length) return cont();
        var split = splitCallback(cont, missing.length);
        for (var i = 0; i < missing.length; ++i)
            CodeMirror.requireMode(missing[i], split, options);
    }

    CodeMirror.requireMode = function (mode, cont, options) {
        if (typeof mode != "string") mode = mode.name;
        if (CodeMirror.modes.hasOwnProperty(mode)) return ensureDeps(mode, cont, options);
        if (loading.hasOwnProperty(mode)) return loading[mode].push(cont);

        var file = options && options.path ? options.path(mode) : CodeMirror.modeURL.replace(/%N/g, mode);
        if (options && options.loadMode) {
            options.loadMode(file, function () {
                ensureDeps(mode, cont, options)
            })
        } else if (env == "plain") {
            var script = document.createElement("script");
            script.src = file;
            var others = document.getElementsByTagName("script")[0];
            var list = loading[mode] = [cont];
            CodeMirror.on(script, "load", function () {
                ensureDeps(mode, function () {
                    for (var i = 0; i < list.length; ++i) list[i]();
                }, options);
            });
            others.parentNode.insertBefore(script, others);
        } else if (env == "cjs") {
            require(file);
            cont();
        } else if (env == "amd") {
            requirejs([file], cont);
        }
    };

    CodeMirror.autoLoadMode = function (instance, mode, options) {
        if (!CodeMirror.modes.hasOwnProperty(mode))
            CodeMirror.requireMode(mode, function () {
                instance.setOption("mode", instance.getOption("mode"));
            }, options);
    };
});
